/Engine/Source/Runtime/Engine/Classes/GameFramework/Pawn.h
Event called after a pawn's controller has changed, on the server and owning client. This will happen at the same time as the delegate on GameInstance
void ReceiveControllerChanged ( [AController](API\Runtime\Engine\GameFramework\AController) * OldController, [AController](API\Runtime\Engine\GameFramework\AController) * NewController )